1
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Kimishima A, Kato H, Nakaguro K, Arai M. Single-step construction of an acetoxypyrroloindole skeleton via tandem iodocyclization/acetoxylation of indoles. Org Biomol Chem 2022; 20:5397-5401. [PMID: 35770620 DOI: 10.1039/d2ob01001a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A method for the synthesis of C3a acetoxy hexahydropyrrolo[2,3-b]indole derivatives via a PhI(OAc)2/nBu4NI mediated tandem iodocyclization/acetoxylation has been developed. The newly developed synthetic strategy features the single-step assembly of various C3a acetoxylated tetrahydropyrrole-, tetrahydrofuran-, and lactone-fused indolines under mild reaction conditions, which enabled efficient asymmetric synthesis of (-)-protubonine B.
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Affiliation(s)
- Atsushi Kimishima
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - Hiroki Kato
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - Keijin Nakaguro
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - Masayoshi Arai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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2
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Payne JL, Deng Z, Flach AL, Johnston JN. Enantioselective iodolactonization to prepare ε-lactone rings using hypervalent iodine. Chem Sci 2022; 13:7318-7324. [PMID: 35799806 PMCID: PMC9214890 DOI: 10.1039/d2sc01587k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/25/2022] [Indexed: 01/03/2023] Open
Abstract
Despite the rapid growth of enantioselective halolactonization reactions in recent years, most are effective only when forming smaller (6,5,4-membered) rings. Seven-membered ε-lactones, are rarely formed with high selectivity, and never without conformational bias. We describe the first highly enantioselective 7-exo-trig iodolactonizations of conformationally unbiased ε-unsaturated carboxylic acids, effected by an unusual combination of a bifunctional BAM catalyst, I2, and I(iii) reagent (PhI(OAc)2:PIDA). We describe the first highly enantioselective 7-exo-trig iodolactonizations of conformationally unbiased ε-unsaturated carboxylic acids, effected by an unusual combination of a bifunctional BAM catalyst, I2, and I(iii) reagent (PhI(OAc)2:PIDA).![]()
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Affiliation(s)
- Jenna L Payne
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University Nashville Tennessee 37235-1822 USA
| | - Zihang Deng
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University Nashville Tennessee 37235-1822 USA
| | - Andrew L Flach
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University Nashville Tennessee 37235-1822 USA
| | - Jeffrey N Johnston
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University Nashville Tennessee 37235-1822 USA
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3
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Liang P, Zhao H, Zhou T, Zeng K, Jiao W, Pan Y, Liu Y, Fang D, Ma X, Shao H. Rapid Oxidation Indoles into 2‐Oxindoles Mediated by PIFA in Combination with
n
‐Bu
4
NCl ⋅ H
2
O. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100234] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Peng Liang
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
- School of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science & Engineering Xueyuan Street 180, Huixing Road Zigong Sichuan 643000 People's Republic of China
| | - Hang Zhao
- School of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science & Engineering Xueyuan Street 180, Huixing Road Zigong Sichuan 643000 People's Republic of China
| | - Tingting Zhou
- School of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science & Engineering Xueyuan Street 180, Huixing Road Zigong Sichuan 643000 People's Republic of China
| | - Kaiyun Zeng
- School of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science & Engineering Xueyuan Street 180, Huixing Road Zigong Sichuan 643000 People's Republic of China
| | - Wei Jiao
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
| | - Yang Pan
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
| | - Yazhou Liu
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
| | - Dongmei Fang
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
| | - Xiaofeng Ma
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
| | - Huawu Shao
- Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
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4
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Kandrnálová M, Kokan Z, Havel V, Nečas M, Šindelář V. Hypervalent Iodine Based Reversible Covalent Bond in Rotaxane Synthesis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908953] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Markéta Kandrnálová
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Zoran Kokan
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Václav Havel
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Marek Nečas
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
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5
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Kandrnálová M, Kokan Z, Havel V, Nečas M, Šindelář V. Hypervalent Iodine Based Reversible Covalent Bond in Rotaxane Synthesis. Angew Chem Int Ed Engl 2019; 58:18182-18185. [PMID: 31587433 DOI: 10.1002/anie.201908953] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Indexed: 12/20/2022]
Abstract
Reversible covalent bonds play a significant role in achieving the high-yielding synthesis of mechanically interlocked molecules. Still, only a handful of such bonds have been successfully employed in synthetic procedures. Herein, we introduce a novel approach for the fast and simple preparation of interlocked molecules, combining the dynamic bond character of bis(acyloxy)iodate(I) anions with macrocyclic bambusuril anion receptors. The proof of principle was demonstrated on rotaxane synthesis, with near-quantitative yields observed in both the classical and "in situ" approach. The rotaxane formation was confirmed in the solid-state and solution by the X-ray and NMR studies. Our novel approach could be utilized in the fields of dynamic combinatorial chemistry, supramolecular polymers, or molecular machines, as well inspire further research on molecules that exhibit dynamic behavior, but owing to their high reactivity, have not been considered as constituents of more elaborate supramolecular structures.
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Affiliation(s)
- Markéta Kandrnálová
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Zoran Kokan
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Václav Havel
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Marek Nečas
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
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6
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Tao J, Estrada CD, Murphy GK. Metal-free intermolecular cyclopropanation between alkenes and iodonium ylides mediated by PhI(OAc)2·Bu4NI. Chem Commun (Camb) 2017; 53:9004-9007. [DOI: 10.1039/c7cc04859a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A simple and highly effective synthesis of poly substituted cyclopropanes was developed. This metal-free intermolecular reaction between iodonium ylides and alkenes is mediated by PhI(OAc)2 and Bu4NI.
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Affiliation(s)
- Jason Tao
- Department of Chemistry
- University of Waterloo
- Waterloo
- Canada
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7
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Zhu D, Chang D, Gan S, Shi L. Direct α-acyloxylation of organic sulfides with the hypervalent (diacyloxyiodo)benzene/tetra-n-butylammonium bromide (TBAB) reagent combination. RSC Adv 2016. [DOI: 10.1039/c6ra01799a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
A novel metal-free approach to directly synthesize α-acyloxy sulfides from readily available alkyl sulfides utilizing hypervalent (diacyloxyiodo)benzene and TBAB reagent combination was developed.
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Affiliation(s)
- Dan Zhu
- Shenzhen Graduate School
- Harbin Institute of Technology
- Shenzhen 518055
- China
- Institute of Organic Chemistry
| | - Denghu Chang
- Shenzhen Graduate School
- Harbin Institute of Technology
- Shenzhen 518055
- China
- Institute of Organic Chemistry
| | - Shaoyan Gan
- Shenzhen Graduate School
- Harbin Institute of Technology
- Shenzhen 518055
- China
- Institute of Organic Chemistry
| | - Lei Shi
- Shenzhen Graduate School
- Harbin Institute of Technology
- Shenzhen 518055
- China
- Institute of Organic Chemistry
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8
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Beltran R, Nocquet-Thibault S, Blanchard F, Dodd RH, Cariou K. PIFA-mediated ethoxyiodination of enamides with potassium iodide. Org Biomol Chem 2016; 14:8448-8451. [DOI: 10.1039/c6ob01673a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The combination of PIFA with KI in ethanol triggers the regioselective ethoxyiodination of a broad range of enamides with excellent yields and diastereoselectivities.
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Affiliation(s)
- R. Beltran
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - S. Nocquet-Thibault
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - F. Blanchard
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - R. H. Dodd
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - K. Cariou
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
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9
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Langdon SM, Legault CY, Gravel M. Origin of Chemoselectivity in N-Heterocyclic Carbene Catalyzed Cross-Benzoin Reactions: DFT and Experimental Insights. J Org Chem 2015; 80:3597-610. [DOI: 10.1021/acs.joc.5b00301] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Steven M. Langdon
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Claude Y. Legault
- Département de Chimie, Université de Sherbrooke, 2500 Boulevard Université, Sherbrooke, Quebec J1K 2R1, Canada
| | - Michel Gravel
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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10
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Guthrie JP. SAMPL4, a blind challenge for computational solvation free energies: the compounds considered. J Comput Aided Mol Des 2014; 28:151-68. [PMID: 24706106 DOI: 10.1007/s10822-014-9738-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 02/19/2014] [Indexed: 10/25/2022]
Abstract
For the fifth time I have provided a set of solvation energies (1 M gas to 1 M aqueous) for a SAMPL challenge. In this set there are 23 blind compounds and 30 supplementary compounds of related structure to one of the blind sets, but for which the solvation energy is readily available. The best current values of each compound are presented along with complete documentation of the experimental origins of the solvation energies. The calculations needed to go from reported data to solvation energies are presented, with particular attention to aspects which are new to this set. For some compounds the vapor pressures (VP) were reported for the liquid compound, which is solid at room temperature. To correct from VPsubcooled liquid to VPsublimation requires ΔSfusion, which is only known for mannitol. Estimated values were used for the others, all but one of which were benzene derivatives and expected to have very similar values. The final compound for which ΔSfusion was estimated was menthol, which melts at 42 °C so that modest errors in ΔSfusion will have little effect. It was also necessary to look into the effects of including estimated values of ΔCp on this correction. The approximate sizes of the effects of inclusion of ΔCp in the correction from VPsubcooled liquid to VPsublimation were estimated and it was noted that inclusion of ΔCp invariably makes ΔGS more positive. To extend the set of compounds for which the solvation energy could be calculated we explored the use of boiling point (b.p.) data from Reaxys/Beilstein as a substitute for studies of the VP as a function of temperature. B.p. data are not always reliable so it was necessary to develop a criterion for rejecting outliers. For two compounds (chlorinated guaiacols) it became clear that inclusion represented overreach; for each there were only two independent pressure, temperature points, which is too little for a trustworthy extrapolation. For a number of compounds the extrapolation from lowest temperature at which the VP was reported to 25 °C was long (sometimes over 100°) so that it was necessary to consider whether ΔCp might have significant effects. The problem is that there are no experimental values and possible intramolecular hydrogen bonds make estimation uncertain in some cases. The approximate sizes of the effects of ΔCp were estimated, and it was noted that inclusion of ΔCp in the extrapolation of VP down to room temperature invariably makes ΔGs more negative.
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Affiliation(s)
- J Peter Guthrie
- Department of Chemistry, University of Western Ontario, London, ON, N6A 5B7, Canada,
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11
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Kim HJ, Cho SH, Chang S. Intramolecular Oxidative Diamination and Aminohydroxylation of Olefins under Metal-Free Conditions. Org Lett 2012; 14:1424-7. [DOI: 10.1021/ol300166q] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Hyun Jin Kim
- Department of Chemistry and Molecular-Level Interface Research Center, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea
| | - Seung Hwan Cho
- Department of Chemistry and Molecular-Level Interface Research Center, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea
| | - Sukbok Chang
- Department of Chemistry and Molecular-Level Interface Research Center, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea
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12
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Ye Y, Wang L, Fan R. Aqueous Iodine(III)-Mediated Stereoselective Oxidative Cyclization for the Synthesis of Functionalized Fused Dihydrofuran Derivatives. J Org Chem 2010; 75:1760-3. [DOI: 10.1021/jo902553k] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yang Ye
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Linfei Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
- Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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13
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Sun Y, Fan R. Construction of 3-oxyindoles via hypervalent iodine mediated tandem cyclization–acetoxylation of o-acyl anilines. Chem Commun (Camb) 2010; 46:6834-6. [DOI: 10.1039/c0cc01911a] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Fan R, Sun Y, Ye Y. Iodine(III)-Mediated Tandem Acetoxylation−Cyclization of o-Acyl Phenols for the Facile Construction of α-Acetoxy Benzofuranones. Org Lett 2009; 11:5174-7. [DOI: 10.1021/ol902067x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Yi Sun
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Yang Ye
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
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15
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Altuna-Urquijo M, Gehre A, Stanforth SP, Tarbit B. A convenient synthesis of pyridine and 2,2′-bipyridine derivatives. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.11.090] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Fan R, Ye Y, Li W, Wang L. Efficient Stereoselective Synthesis of Nitrocyclopropanes by the Oxidative Cyclization of Michael Adducts of Nitroolefins with Activated Methylene Compounds. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800452] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Merkushev EB. Organic Compounds of Polyvalent Iodine–Derivatives of Iodosobenzene. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1987v056n09abeh003308] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Wynne JH, Lloyd CT, Witsil DR, Mushrush GW, Stalick WM. SELECTIVE CATALYTIC OXIDATION OF ALCOHOLS USING HYDROGEN PEROXIDE. ORG PREP PROCED INT 2000. [DOI: 10.1080/00304940009355958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Iodophosphoryloxylation of carbon-carbon multibonds and its application to glycals. J Org Chem 2000; 65:4679-84. [PMID: 10959874 DOI: 10.1021/jo000296r] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iodophosphoryloxylation of carbon-carbon multibonds was attempted. Alkynes and cyclohexene were converted to the corresponding 1,2-iodophosphoryloxylated compounds in moderate to good yields with a trivalent iodine compound/iodine system, while glucal gave mainly the corresponding iodohydrin compound in this system. However, 2-deoxy-2-iodoglycosyl diphenylphosphinates were obtained from the corresponding glycals with a diphenylphosphinic acid/iodine/potassium carbonate system in good yields. Moreover, triethylborane smoothly reduced 2-deoxy-2-iodoglycosyl diphenylphosphinates to 2-deoxyglycosyl diphenylphosphinates in a 1,4-cyclohexadiene solvent.
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20
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Monenschein H, Sourkouni-Argirusi G, Schubothe KM, O'Hare T, Kirschning A. Reactions of Alkenes, Alkynes, and Alkoxyallenes with New Polymer-Supported Electrophilic Reagents. Org Lett 1999. [DOI: 10.1021/ol991149m] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Holger Monenschein
- Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany, and Department of Chemistry, Willamette University, 900 State Street, Salem, Oregon 97301
| | - Georgia Sourkouni-Argirusi
- Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany, and Department of Chemistry, Willamette University, 900 State Street, Salem, Oregon 97301
| | - Katherine M. Schubothe
- Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany, and Department of Chemistry, Willamette University, 900 State Street, Salem, Oregon 97301
| | - Thomas O'Hare
- Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany, and Department of Chemistry, Willamette University, 900 State Street, Salem, Oregon 97301
| | - Andreas Kirschning
- Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany, and Department of Chemistry, Willamette University, 900 State Street, Salem, Oregon 97301
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21
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Ohno M, Oguri I, Eguchi S. PhI(OAc)2-Promoted Rearrangement of the Hydroxyl Group: Ring Expansion of 4-Hydroxy-2-cyclobutenone to 2(5H)-Furanone in Comparison with Ring Cleavage of the α-Hydroxycycloalkanone to the ω-Formyl Ester. J Org Chem 1999. [DOI: 10.1021/jo990704v] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masatomi Ohno
- Department of Materials Science and Engineering, Toyota Technological Institute, 2−12−1 Hisakata, Tempaku, Nagoya 468-8511, Japan
| | - Isamu Oguri
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Shoji Eguchi
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
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23
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24
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Urbansky ET, Cooper BT, Margerum DW. Disproportionation Kinetics of Hypoiodous Acid As Catalyzed and Suppressed by Acetic Acid-Acetate Buffer. Inorg Chem 1997; 36:1338-1344. [PMID: 11669710 DOI: 10.1021/ic960745z] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The kinetics of the disproportionation of hypoiodous acid to give iodine and iodate ion (5HOI right harpoon over left harpoon 2I(2) + IO(3)(-) + H(+) + 2H(2)O) are investigated in aqueous acetic acid-sodium acetate buffer. The rate of iodine formation is followed photometrically at -log [H(+)] = 3.50, 4.00, 4.50, and 5.00, &mgr; = 0.50 M (NaClO(4)), and 25.0 degrees C. Both catalytic and inhibitory buffer effects are observed. The first process is proposed to be a disproportionation of iodine(I) to give HOIO and I(-); the iodide then reacts with HOI to give I(2). The reactive species (acetato-O)iodine(I), CH(3)CO(2)I, is postulated to increase the rate by assisting in the formation of I(2)O, a steady-state species that hydrolyzes to give HOIO and I(2). Inhibition is postulated to result from the formation of the stable ion bis(acetato-O)iodate(I), (CH(3)CO(2))(2)I(-), as buffer concentration is increased. This species is observed spectrophotometrically with a UV absorption shoulder (lambda = 266 nm; epsilon = 530 M(-)(1) cm(-)(1)). The second process is proposed to be a disproportionation of HOIO to give IO(3)(-) and I(2). Above 1 M total buffer, the reaction becomes reversible with less than 90% I(2) formation. Rate and equilibrium constants are resolved and reported for the proposed mechanism.
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Affiliation(s)
- Edward T. Urbansky
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-1393
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Liu ZD, Chen ZC. Hypervalent iodine in synthesis: 13: Action of phenyliodine(III) dicarboxylates on diaryltellurides: A facile and general method for the preparation of diaryltellurium dicarboxylates. HETEROATOM CHEMISTRY 1992. [DOI: 10.1002/hc.520030518] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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